CN117028027A - Cascade steam supply system of combined cycle coupling back press of combustion turbine - Google Patents
Cascade steam supply system of combined cycle coupling back press of combustion turbine Download PDFInfo
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- CN117028027A CN117028027A CN202311167390.7A CN202311167390A CN117028027A CN 117028027 A CN117028027 A CN 117028027A CN 202311167390 A CN202311167390 A CN 202311167390A CN 117028027 A CN117028027 A CN 117028027A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 8
- 230000008878 coupling Effects 0.000 title abstract description 7
- 238000010168 coupling process Methods 0.000 title abstract description 7
- 238000005859 coupling reaction Methods 0.000 title abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 22
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 239000002918 waste heat Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 3
- 239000008236 heating water Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
- F22D1/18—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a cascade steam supply system of a combined cycle coupling back press of a combustion turbine, which relates to the technical field of heat supply and comprises the following components: the system comprises a gas turbine, a waste heat boiler, a main steam pipeline, a back pressure unit steam inlet regulating valve, a back pressure unit steam inlet isolation valve, a high-pressure steam supply check valve, a high-pressure steam supply regulating valve, a desuperheater, a high-pressure steam supply isolation valve, a back pressure unit steam discharge check valve, a back pressure unit steam discharge regulating valve and a back pressure unit steam discharge isolation valve, wherein the waste heat boiler is used for heating water and conveying high-pressure high-temperature steam generated after heating to the main steam pipeline, a first part of high-pressure high-temperature steam is supplied to a first user after passing through the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolation valve which are connected in sequence, a second part of high-pressure high-temperature steam enters the back pressure unit after passing through the back pressure unit steam inlet regulating valve and the back pressure unit steam inlet isolation valve which are connected in sequence, and then supplies power to a second user by using residual pressure after working of the back pressure unit, and the back pressure unit steam discharge pipeline is sequentially provided with the back pressure unit steam discharge check valve, the back pressure unit steam discharge regulating valve and the back pressure unit steam discharge isolation valve and the back pressure unit.
Description
Technical Field
The invention relates to the technical field of heat supply, in particular to a cascade steam supply system of a combined cycle coupling back press of a combustion turbine.
Background
In recent years, the economy of China rapidly develops, huge energy consumption is brought by the economy development, the brought environmental pollution and energy crisis are gradually deepened, and the implementation of the cogeneration transformation of the concentrated steam supply becomes an important development target for solving the problems of distributed layout, difficult monitoring, serious pollution and the like of a small boiler.
At present, concentrated industrial steam supply is mainly realized through steam supply transformation of a coal motor group, but the capacity of an assembly machine for some coal motors is insufficient, and the distance is far.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
The invention provides a cascade steam supply system of a combined cycle coupling back press of a gas turbine, which comprises the following components:
a gas turbine, a waste heat boiler, a main steam pipeline, a back pressure unit steam inlet regulating valve, a back pressure unit steam inlet isolation valve, a high-pressure steam supply check valve, a high-pressure steam supply regulating valve, a desuperheater, a high-pressure steam supply isolation valve, a back pressure unit steam discharge check valve, a back pressure unit steam discharge regulating valve and a back pressure unit steam discharge isolation valve, wherein,
the waste heat boiler is used for heating the feed water and delivering the high-pressure high-temperature steam generated after heating to the main steam pipeline, the first part of the high-pressure high-temperature steam is used for supplying steam for a first user after passing through the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve which are sequentially connected, the second part of the high-pressure high-temperature steam is used for supplying steam for a second user after passing through the back pressure unit steam inlet regulating valve and the back pressure unit steam inlet isolating valve which are sequentially connected, and then the residual pressure after working of the back pressure unit is utilized for supplying steam for the second user,
and the exhaust pipeline of the back pressure unit is sequentially provided with the back pressure unit exhaust check valve, the back pressure unit exhaust regulating valve and the back pressure unit exhaust isolating valve.
Optionally, the device also comprises a first generator,
and the back pressure unit drives the first generator to supply power to a power grid.
Optionally, the gas turbine comprises:
the combustion chamber is used for combusting fuel to drive the gas turbine to do work so as to drive the second generator to supply power to a power grid.
Optionally, the exhaust-heat boiler is used for heating by utilizing the high-temperature exhaust gas discharged by the turbine so as to obtain the high-pressure high-temperature steam.
Optionally, the system is configured to:
when the first user uses the steam and the second user does not need to use the steam, the back pressure unit stops running, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are opened to supply the steam to the first user, and the desuperheater is used for putting the desuperheater into operation.
Optionally, the system is further configured to:
and closing the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve and the back pressure unit steam exhaust isolating valve, wherein the back pressure unit does not enter steam.
Optionally, the system is configured to:
when the first user uses no steam and the second user uses steam, the back pressure unit is put into operation, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are closed at the moment, steam is supplied to the second user, and the temperature reduction water is withdrawn from operation.
Optionally, the system is further configured to:
and opening the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve, the back pressure unit steam exhaust isolating valve and the back pressure unit steam exhaust enter a low-pressure steam supply pipeline to supply steam to a second user, and simultaneously, supplying power to a power grid by a second generator.
Optionally, the system is configured to:
when the first user and the second user both need to supply steam, the bypass pipeline is put into operation, and meanwhile the back pressure unit is put into operation, and at the moment, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are opened to supply steam to the first user, and the temperature reduction water is put into operation.
Optionally, the system is further configured to:
and opening the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve and the back pressure unit steam exhaust isolating valve, wherein back pressure unit steam exhaust enters a low-pressure steam supply pipeline to supply steam to a second user, and simultaneously the second generator supplies power to a power grid.
The embodiment of the disclosure has at least the following beneficial effects:
the cascade steam supply system of the gas turbine combined cycle coupling back press is provided, has high heat and power cogeneration heat efficiency, saves energy, can further improve the energy utilization rate when the same electric energy and heat energy are externally supplied, reduces environmental pollution and is beneficial to further popularization.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a cascade steam supply system of a combined cycle coupled back press for a gas turbine according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The step steam supply system of the combined cycle coupled back press of the gas turbine in the embodiment of the invention is described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a cascade steam supply system of a combined cycle coupled back press for a gas turbine according to an embodiment of the present invention.
As shown in fig. 1, the cascade steam supply system of the combined cycle coupled back press of the gas turbine may include: the gas turbine, the waste heat boiler 4, the main steam pipeline 15, the back pressure unit 5, the back pressure unit steam inlet regulating valve 101, the back pressure unit steam inlet isolation valve 102, the high-pressure steam supply check valve 201, the high-pressure steam supply regulating valve 202, the desuperheater 203, the high-pressure steam supply isolation valve 204, the back pressure unit steam discharge check valve 301, the back pressure unit steam discharge regulating valve 302 and the back pressure unit steam discharge isolation valve 303, wherein,
the waste heat boiler is used for heating the water supply 10 and delivering high-pressure high-temperature steam 15 generated after heating to the main steam pipeline, a first part of high-pressure high-temperature steam 14 is used for supplying steam to a first user 6 after passing through the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve which are sequentially connected, a second part of high-pressure high-temperature steam 15 is used for supplying steam to a second user 7 after passing through the back pressure unit steam inlet regulating valve and the back pressure unit steam inlet isolating valve which are sequentially connected, and then the residual pressure after working of the back pressure unit is used for supplying steam to the second user 7,
and the exhaust pipeline of the back pressure unit is sequentially provided with the back pressure unit exhaust check valve, the back pressure unit exhaust regulating valve and the back pressure unit exhaust isolating valve.
The first user is a high-voltage user, and the second user is a low-voltage user.
And (3) heating water: the waste heat boiler is used to heat the feedwater to a desired temperature.
High pressure high temperature steam is delivered to the main steam pipeline: the heated high-pressure high-temperature steam is conveyed to a main steam pipeline through a pipeline.
Steam supply for the first user: the first part of high-pressure high-temperature steam is supplied to a first user after passing through a high-pressure steam supply check valve, a high-pressure steam supply regulating valve, a desuperheater and a high-pressure steam supply isolating valve which are connected.
Steam supply for the second user: the second part of high-pressure high-temperature steam enters the back pressure unit through the connected back pressure unit steam inlet regulating valve and the back pressure unit steam inlet isolating valve. Then, the back pressure unit is used for working power, and the residual pressure steam is supplied to a second user.
Exhaust steam of back pressure unit: the back pressure unit discharges steam through a steam discharge pipeline, and a back pressure unit steam discharge check valve, a back pressure unit steam discharge regulating valve and a back pressure unit steam discharge isolating valve are sequentially arranged.
It is noted that in this system, the first user is a high-voltage user and the second user is a low-voltage user. The design can utilize high-pressure high-temperature steam generated by the waste heat boiler according to the requirements of users, and realize energy supply and utilization through the back pressure unit.
Optionally, the device also comprises a first generator,
and the back pressure unit drives the first generator to supply power to a power grid.
Optionally, the gas turbine comprises:
the device comprises a combustion chamber 1, a compressor 2, a turbine 3 and a second generator 8, wherein the combustion chamber is used for combusting fuel 11 to drive gas to do work on the turbine, and then drive the second generator to supply power to a power grid.
Optionally, the exhaust-heat boiler is used for heating by using the high-temperature exhaust gas 13 discharged by the turbine to obtain the high-pressure high-temperature steam.
Optionally, the system is configured to:
when the first user uses the steam and the second user does not need to use the steam, the back pressure unit stops running, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are opened to supply the steam to the first user, and the desuperheater is used for putting the desuperheater into operation.
Optionally, the system is further configured to:
and closing the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve and the back pressure unit steam exhaust isolating valve, wherein the back pressure unit does not enter steam.
It should be noted that, when the high-voltage user needs to use steam and the low-voltage user does not need to use steam temporarily, the following operations may be adopted to meet the needs of the high-voltage user:
stopping the back pressure unit to operate: and closing the back pressure machine steam inlet regulating valve, the back pressure machine steam inlet isolating valve, the back pressure machine steam exhaust check valve, the back pressure machine steam exhaust regulating valve and the back pressure machine steam exhaust isolating valve to stop the back pressure unit.
Steam is supplied to high-pressure users: and opening a high-pressure steam supply check valve, a high-pressure steam supply regulating valve, a desuperheater and a high-pressure steam supply isolating valve to directly supply steam to a high-pressure user.
Real-time adjusting the temperature reduction water: according to the real-time demand of the steam consumption, the flow of the desuperheating water is regulated to control the temperature of the high-pressure steam, so that the proper steam condition is ensured to be supplied to the high-pressure user.
Through the operation mode, the system can meet the larger steam consumption requirement of the high-voltage user, and meanwhile, the low-voltage user is not influenced temporarily.
Optionally, the system is configured to:
when the first user uses no steam and the second user uses steam, the back pressure unit is put into operation, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are closed at the moment, steam is supplied to the second user, and the temperature reduction water is withdrawn from operation.
Optionally, the system is further configured to:
and opening the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve, the back pressure unit steam exhaust isolating valve and the back pressure unit steam exhaust enter a low-pressure steam supply pipeline to supply steam to a second user, and simultaneously, supplying power to a power grid by a second generator.
It should be noted that, when the high-voltage user does not need to use steam and the low-voltage user needs to use steam, the following operations may be adopted to meet the needs of the low-voltage user and improve the power generation capacity of the system:
starting a back pressure unit: and opening a back pressure machine steam inlet regulating valve, a back pressure machine steam inlet isolating valve, a back pressure machine steam exhaust check valve, a back pressure machine steam exhaust regulating valve and a back pressure machine steam exhaust isolating valve to enable the back pressure machine set to start to operate.
Closing the high-pressure steam supply system: and closing the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve, and stopping steam supply to the high-pressure user.
Back pressure machine exhaust steam supply low pressure user: exhaust steam generated by the back pressure unit enters the low-pressure steam supply pipeline through the back pressure machine exhaust check valve, the back pressure machine exhaust regulating valve and the back pressure machine exhaust isolating valve, so that the steam use requirement of a low-pressure user is met.
And (3) power supply by a generator: meanwhile, the second generator supplies power to the power grid so as to improve the generated energy of the system.
Through the operation mode, the system can meet the steam consumption requirement of a low-voltage user, and extra generated energy is generated by utilizing the steam exhaust of the back pressure unit.
Optionally, the system is configured to:
when the first user and the second user both need to supply steam, the bypass pipeline is put into operation, and meanwhile the back pressure unit is put into operation, and at the moment, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are opened to supply steam to the first user, and the temperature reduction water is put into operation.
Optionally, the system is further configured to:
and opening the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve and the back pressure unit steam exhaust isolating valve, wherein back pressure unit steam exhaust enters a low-pressure steam supply pipeline to supply steam to a second user, and simultaneously the second generator supplies power to a power grid.
When the system needs to supply steam to the high-pressure user and the low-pressure user at the same time, and the bypass pipeline is put into operation, the back pressure unit is also put into operation, the following operations can be adopted to meet the demands of the users, and the power generation amount, the energy utilization rate and the operation economy of the system are improved:
starting a high-pressure steam supply system: and opening a high-pressure steam supply check valve, a high-pressure steam supply regulating valve, a desuperheater and a high-pressure steam supply isolating valve, and delivering high-pressure steam supply to a high-pressure user, and regulating steam supply parameters according to real-time requirements of the high-pressure user.
Starting a back pressure unit: and opening a back pressure machine steam inlet regulating valve, a back pressure machine steam inlet isolating valve, a back pressure machine steam exhaust check valve, a back pressure machine steam exhaust regulating valve and a back pressure machine steam exhaust isolating valve to enable the back pressure machine set to start to operate.
The low-pressure steam supply pipeline is connected with the back pressure unit: exhaust steam generated by the back pressure unit enters the low-pressure steam supply pipeline through the bypass pipeline, so that the steam use requirement of a low-pressure user is met. In the process, the high-pressure steam supply pipeline and the low-pressure steam supply pipeline are kept isolated, so that the system is ensured to supply steam to high-pressure users.
And (3) power supply by a generator: meanwhile, the second generator supplies power to the power grid so as to further improve the generated energy of the system.
Through the operation mode, the system can simultaneously meet the steam consumption demands of high-pressure users and low-pressure users, generate extra generated energy by utilizing the exhaust steam of the back pressure unit, and furthest improve the energy utilization rate and the operation economy.
Compared with the prior art, the invention designs the cascade steam supply system of the gas turbine combined cycle coupling back press, which realizes the concentrated steam supply requirement in certain special areas by carrying out the adaptive steam supply modification on the gas turbine combined cycle system, solves the problems of distributed layout, difficult monitoring, serious pollution and the like of small boilers, has high heat and power co-production heat efficiency, saves energy, can further improve the energy utilization rate when the same electric energy and heat energy are externally supplied, reduces the environmental pollution, and is beneficial to further popularization.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A cascade steam supply system of a combined cycle coupled back pressure unit of a gas turbine, comprising:
a gas turbine, a waste heat boiler, a main steam pipeline, a back pressure unit steam inlet regulating valve, a back pressure unit steam inlet isolation valve, a high-pressure steam supply check valve, a high-pressure steam supply regulating valve, a desuperheater, a high-pressure steam supply isolation valve, a back pressure unit steam discharge check valve, a back pressure unit steam discharge regulating valve and a back pressure unit steam discharge isolation valve, wherein,
the waste heat boiler is used for heating the feed water and delivering the high-pressure high-temperature steam generated after heating to the main steam pipeline, the first part of the high-pressure high-temperature steam is used for supplying steam for a first user after passing through the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve which are sequentially connected, the second part of the high-pressure high-temperature steam is used for supplying steam for a second user after passing through the back pressure unit steam inlet regulating valve and the back pressure unit steam inlet isolating valve which are sequentially connected, and then the residual pressure after working of the back pressure unit is utilized for supplying steam for the second user,
and the exhaust pipeline of the back pressure unit is sequentially provided with the back pressure unit exhaust check valve, the back pressure unit exhaust regulating valve and the back pressure unit exhaust isolating valve.
2. The system of claim 1, further comprising a first generator,
and the back pressure unit drives the first generator to supply power to a power grid.
3. The system of claim 1, wherein the gas turbine comprises:
the combustion chamber is used for combusting fuel to drive the gas turbine to do work so as to drive the second generator to supply power to a power grid.
4. The system of claim 3, wherein,
the waste heat boiler is used for heating by utilizing high-temperature exhaust gas discharged by the turbine so as to obtain the high-pressure high-temperature steam.
5. The system of claim 1, wherein the system is configured to:
when the first user uses the steam and the second user does not need to use the steam, the back pressure unit stops running, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are opened to supply the steam to the first user, and the desuperheater is used for putting the desuperheater into operation.
6. The system of claim 5, wherein the system is further configured to:
and closing the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve and the back pressure unit steam exhaust isolating valve, wherein the back pressure unit does not enter steam.
7. The system of claim 1, wherein the system is configured to:
when the first user uses no steam and the second user uses steam, the back pressure unit is put into operation, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are closed at the moment, steam is supplied to the second user, and the temperature reduction water is withdrawn from operation.
8. The system of claim 7, wherein the system is further configured to:
and opening the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve, the back pressure unit steam exhaust isolating valve and the back pressure unit steam exhaust enter a low-pressure steam supply pipeline to supply steam to a second user, and simultaneously, supplying power to a power grid by a second generator.
9. The system of claim 1, wherein the system is configured to:
when the first user and the second user both need to supply steam, the bypass pipeline is put into operation, and meanwhile the back pressure unit is put into operation, and at the moment, the high-pressure steam supply check valve, the high-pressure steam supply regulating valve, the desuperheater and the high-pressure steam supply isolating valve are opened to supply steam to the first user, and the temperature reduction water is put into operation.
10. The system of claim 9, wherein the system is further configured to:
and opening the back pressure unit steam inlet regulating valve, the back pressure unit steam inlet isolating valve, the back pressure unit steam exhaust check valve, the back pressure unit steam exhaust regulating valve and the back pressure unit steam exhaust isolating valve, wherein back pressure unit steam exhaust enters a low-pressure steam supply pipeline to supply steam to a second user, and simultaneously the second generator supplies power to a power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311167390.7A CN117028027A (en) | 2023-09-11 | 2023-09-11 | Cascade steam supply system of combined cycle coupling back press of combustion turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311167390.7A CN117028027A (en) | 2023-09-11 | 2023-09-11 | Cascade steam supply system of combined cycle coupling back press of combustion turbine |
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| Publication Number | Publication Date |
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| CN117028027A true CN117028027A (en) | 2023-11-10 |
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|---|---|---|---|
| CN202311167390.7A Pending CN117028027A (en) | 2023-09-11 | 2023-09-11 | Cascade steam supply system of combined cycle coupling back press of combustion turbine |
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| CN (1) | CN117028027A (en) |
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- 2023-09-11 CN CN202311167390.7A patent/CN117028027A/en active Pending
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